Connective tissue proper Flashcards
What are the two subcategories of connective tissue proper?
loose connective tissue and dense connective tissue
Types of loose connective tissue
Areolar, adipose and reticular
Why is loose connective tissue loose
Because extracellular matrix is organized into loose strands and cells
(areolar is Latin for a “little open space”)
Why is dense connective tissue dense
Less ground substance, densely packed collaged
Types of dense connective tissue
Regular, irregular, elastic
Function of areolar
provides support and helps to protect organs, muscles, and many other tissues
Where is areolar tissue located?
Underneath the epidermis of the skin
What is the function of adipose
Warmth, stores energy, absorbs shock and slows heat loss
Where is adipose located?
Under the skin of the sides, butt, breasts, kidneys
What is the difference between regular and irregular dense connective tissue structure?
fibers in regular are arranged parallel whilst fibers in irregular are not
What is the difference between regular and irregular dense connective tissue function?
Dense regular connective tissue is found in ligaments and tendons. Dense irregular connective tissue is present in the dermis of the skin.
Dense fibrous (regular) function
provides firm attachment, pulls muscles, stabilizes bones
Location of Dense regular
Between skeletal muscles and skeleton (tendons and ligaments)
Dense fibrous (irregular) function
Strength to resist forces from different directions, prevents overexpansion of organs
Location of Dense irregular
Visceral organs, nerve and muscle sheaths, dermis
Function of reticular connective tissue
Filters, engulfs, destroys
Function of reticular fibers
forms a scaffold for other organs
Location of reticular tissue
Bone marrow (makes blood), spleen (filters old blood cells), lymph nodes
Why do lymph nodes swell when you’re sick?
Because they are filtering out the bacteria
Why do dense connective tissues heal so slowly?
Because they are avascular
What fibers and cells are in areolar tissue?
Elastic fibers, collagen fibers, fibroblasts, microphages, fat cells, plasma cells
Fibroblasts
Make fiber
Microphages
are large cells that are capable of moving about and ingesting foreign substances, including microorganisms in the connective tissue.
What cells and fibers are in dense regular
Collagen fibers and fibroblasts
What cells and fibers are in dense regular
Collagen fibers, fibroblasts, elastic fibers
General function of loose connective tissue
consists of relatively few protein fibers that form a lacy network, with numerous spaces filled with ground substance and fluid.
Mast cells
cells that release chemicals, such as histamine, that promote inflammation.
three major components of extracellular matrix
protein fibers, ground substance, fluid
Elastic fibers
have the ability to return to their original shape after being stretched or compressed, giving tissue an elastic quality.
